<html>
<body>
<style type="text/css">
div[class|="test-en"] {
  color: red;
  font-weight: bold;
}
</style>

<div class="test-en-word">
TEST1
</div><!--#test-->

<div class="test-en">
TEST2
</div><!--#test-->

<div class="test">
TEST3
</div><!--#test-->

<div class="x-test-en">
TEST3
</div><!--#test-->
</body>
</html>